Edge inserting mechanism for film production and film blowing machine

Abstract

The utility model relates to the technical field of plastic film production equipment, in particular to an edge inserting mechanism and a film blowing machine for film production, which comprise a base, two groups of guide pieces and two groups of edge inserting pieces, the two sets of guiding pieces are oppositely arranged at an angle to form a guiding space, the edge inserting pieces are assembled in the transverse direction of the base in a sliding mode, the two sets of edge inserting pieces are oppositely arranged and slide back and forth towards the guiding space, the transverse section of each edge inserting piece is triangular, the contact area between the edge inserting pieces and a cylindrical film is increased, and the edge inserting pieces can be inserted into the cylindrical film. The edge folding process is more stable and uniform, the edge folding regularity of a film bag is improved, the risk that the edge folding piece is wrapped by a film is reduced, the operation stability and efficiency of the whole film blowing machine are improved, in addition, the edge inserting piece can be assembled in the transverse direction of the base in a sliding mode, and the film blowing machine is suitable for machining and production of films of different specifications.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic film production equipment, in particular to an edge inserting mechanism and a film blowing machine for film production. Background Art

[0002] Film is a thin and soft material made of plastic resin, usually with a thickness of several microns to several hundred microns. Film bags are produced by film blowing machines, which mainly include the following mechanisms: an extrusion mechanism that melts the plastic raw materials through an extruder and forms a cylindrical film of the required thickness through a die head, an inserting mechanism that inserts and folds the cylindrical film to form a sheet-like bag structure, a traction mechanism for changing the moving direction of the film bag to facilitate winding, and a winding mechanism that rolls the film bag into a roll;

[0003] Since folded edge plastic bags are widely used because of their larger capacity than non-folded edge plastic bags, in the manufacturing process of plastic bags, the two sides of the bag body need to be inserted. Inserting edge means that after the plastic bag body is inflated to form a cylindrical film, the two sides of the cylindrical film are squeezed inward by an inserting mechanism to form an inward folding shape on both sides of the cylindrical film, and then the two sides of the cylindrical film are pressed by a guide to form a sheet film bag with folded edges on both sides;

[0004] In the prior art, the hemming mechanism used for folding plastic bags uses two sets of hemming wheels arranged opposite to each other to perform double hemming on the cylindrical film to improve the neatness of the hemming. However, the contact area between the hemming wheel and the cylindrical film is relatively small, and this contact is discontinuous. This means that in the process of folding the cylindrical film while moving, the hemming wheel does not exert enough force on the film, which can easily cause the hemming to reset, resulting in incomplete hemming, affecting the appearance quality and performance of the film bag; secondly, since the contact between the hemming wheel and the cylindrical film is line contact and the friction force is small, the hemming wheel is easily covered by the upward film during the processing. Once the hemming wheel is covered by the film, it will be entangled, which will cause the hemming wheel to get stuck, so that the production process will be forced to be interrupted. In severe cases, it may even cause the film bag to tear, affecting the operation of the entire film blowing machine. Utility Model Content

[0005] In order to solve the problem in the prior art that the contact area between the folding mechanism and the film is small and affects the processing, the present application provides an edge insertion mechanism and a film blowing machine for film production.

[0006] The utility model provides an edge inserting mechanism and a film blowing machine for film production, which adopt the following technical solutions:

[0007] In the first aspect, the utility model provides an edge inserting mechanism for film production, comprising a base, two groups of guide members and two groups of edge inserting members, wherein the guide members can be rotatably assembled in the longitudinal direction of the base, and the two groups of guide members are arranged at angles to each other to form a guide space, and the edge inserting members can be slidably assembled in the transverse direction of the base, and the two groups of edge inserting members are arranged to each other and slide back and forth toward the guide space, and the transverse cross-section of the edge inserting members is a triangle.

[0008] Preferably, it also includes a double-headed screw, the top of the guide member is hinged to the base, one end of the double-headed screw is threadedly connected to one group of the guide members, and the other end of the double-headed screw is threadedly connected to another group of the guide members.

[0009] Preferably, it further comprises a support arm, a side of the edge insert away from the guide space is connected to an adjustment rod, and the support arm is connected to the base and is used for sliding assembly with the adjustment rod.

[0010] Preferably, two groups of adjusting rods are provided, and the two groups of adjusting rods are arranged up and down and are respectively connected to the edge inserts.

[0011] Preferably, a connecting hole is provided in the longitudinal direction of the support arm, the double-headed screw is passed through the connecting hole and connected to the guide member, and the axis of the adjusting rod is arranged perpendicular to the axis of the guide member.

[0012] Preferably, the outer ring wall of the adjusting rod is provided with threads, and the adjusting rod is threadedly connected to the supporting arm.

[0013] Preferably, it further comprises a plurality of groups of guide blocks, wherein the guide blocks are arranged on a side of the guide member facing the guide space, and the guide blocks are provided in a plurality of groups, and the plurality of groups of guide blocks are spaced apart along the side wall of the guide member.

[0014] Preferably, the edge insert is provided with a limited slip layer, and the limited slip layer is provided on the outer surface of the edge insert.

[0015] Preferably, the transverse cross-section of the edge insert is an isosceles triangle, and the inner vertex angle is 10-15°.

[0016] In the second aspect, the utility model provides a film blowing machine, including a machine base, an extrusion mechanism, a traction mechanism, a winding mechanism, and also includes the above-mentioned edge insertion mechanism for film production, wherein the extrusion mechanism is installed below the machine base and is used to process the plastic raw material into a film, the edge insertion mechanism is installed above the machine base and is used to fold the film into a film bag, the traction mechanism is installed on the base and is used to pull the film bag moving upward to move downward, and the winding mechanism is installed on one side of the machine base and is used to wind up the film bag.

[0017] The beneficial effects of the utility model are:

[0018] The contact area between the edge insert and the cylindrical film is increased by setting the edge insert with a triangular cross section. As the cylindrical film moves upward, the guide space and the width of the edge insert gradually shrink, making the folding process more stable and more uniform, improving the neatness of the folding of the film bag, improving the appearance quality, reducing the possibility of folding reset, reducing the risk of the folding piece being covered by the film, avoiding the entanglement and jamming of the edge insert and the film during the production process, and improving the operation stability and efficiency of the entire film blowing machine. In addition, the edge insert can be slidably assembled in the transverse direction of the base, making the operation and adjustment more convenient and flexible, and the two sets of guide pieces arranged at an angle to each other form an effective guide space, making the film smoother during the folding process;

[0019] Multiple sets of guide blocks are arranged at equal intervals along the side wall of the guide, providing more accurate and stable guidance for the upward movement of the film, guiding the film bag to smoothly enter the guide space, and improving the quality and consistency of the product. In addition, the guide blocks made of wood material have low conductivity, which effectively reduces the generation of static electricity and avoids the adverse effects of static electricity on the film bag processing;

[0020] The anti-skid layer is provided on the edge inserting piece to increase the friction between the edge inserting piece and the film, ensuring that the edge inserting process is more stable and reliable. The anti-skid layer made of velvet material is not easy to produce sharp edges, which effectively avoids scratching or damaging the film during the edge inserting process and protects the integrity and aesthetics of the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a first stereogram of the edge inserting mechanism in an embodiment of the present application;

[0022] Figure 2 is a second stereoscopic diagram of the edge inserting mechanism in the embodiment of the present application;

[0023] Figure 3 is a top view of the edge insertion mechanism in the embodiment of the present application;

[0024] Figure 4 This is a front view of the edge insertion mechanism in the embodiment of the present application;

[0025] Figure 5 It is a schematic diagram of the assembly of the edge insert and the adjustment rod in the embodiment of the present application;

[0026] Figure 6 is a first stereoscopic diagram of the traction mechanism in an embodiment of the present application;

[0027] Figure 7 is a second stereoscopic diagram of the traction mechanism in the embodiment of the present application;

[0028] Figure 8 It is a schematic diagram of the assembly of the commutating member in the embodiment of the present application;

[0029] Fig. 9 It is an assembly stereogram of the edge inserting mechanism and the traction mechanism in the embodiment of the present application;

[0030] Fig.10 It is a front view of the edge insertion mechanism and the traction mechanism in the embodiment of the present application;

[0031] Fig.11 is a schematic diagram of the positional relationship between the edge inserting mechanism and the traction mechanism in the embodiment of the present application;

[0032] Fig.12 It is a front view of the film blowing machine in the embodiment of the present application.

[0033] Description of reference numerals: 1. base; 101. arc frame; 2. guide member; 201. guide space; 202. double-headed screw; 204. guide block; 3. insert member; 301. support arm; 3011. connecting hole; 302. adjustment rod; 3021. pusher; 303. connecting cavity; 305. slip-limiting layer; 4. traction bracket; 401. longitudinal sliding groove; 402. vertical sliding groove; 403. first guide plate; 404. second guide plate; 5. longitudinal transmission roller; 501. vertical traction space; 502. The first cylinder; 503, longitudinal sliding block; 6, reversing member; 601, swing arm; 602, connecting arm; 6011, right-angle frame; 6012, long hole; 7, vertical transmission roller; 701, longitudinal traction space; 702, second cylinder; 703, vertical sliding block; 8, traction motor; 801, traction wheel; 9, machine base; 901, extrusion mechanism; 902, traction mechanism; 903, winding mechanism; 904, edge insertion mechanism; 905, first guide wheel; 907, second guide wheel; 909, third guide wheel. DETAILED DESCRIPTION

[0034] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that each technical feature and the overall technical solution of the utility model can be understood intuitively and vividly, but it cannot be understood as a limitation on the protection scope of the utility model.

[0035] In the description of the present invention, if there is a description of orientation, for example, the orientation or position relationship indicated by "upper", "lower", "front", "back", "left", "right", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description. When a feature is referred to as "set", "fixed", or "connected" to another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, or connected to the other feature.

[0036] In the description of the present invention, if the orientation description is involved, the orientation or position relationship indicated by "horizontal", "longitudinal", "vertical" etc. is based on the attached Fig. 9 In the orientation or position relationship shown, the X-axis represents the “horizontal direction”, the Y-axis represents the “longitudinal direction”, and the Z-axis represents the “vertical direction”.

[0037] In the description of the present utility model, if "several" is involved, it means one or more, if "multiple" is involved, it means more than two, and if "first" or "second" is involved, it should be understood as being used to distinguish technical features.

[0038] In addition, unless otherwise defined, the technical terms and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art. The terms used in the present invention are only for describing specific embodiments, not for limiting the present invention.

[0039] Example 1: Figures 1 to 5 , Figures 9 to 11 As shown, a side inserting mechanism for film production includes a base 1, two groups of guide members 2 and two groups of side inserting members 3. The guide members 2 can be rotatably assembled in the longitudinal direction of the base 1. The two groups of guide members 2 are arranged at angles to each other to form a guide space 201. The side inserting members 3 can be slidably assembled in the transverse direction of the base 1. The two groups of side inserting members 3 are arranged to each other and slide back and forth toward the guide space 201. The transverse cross-section of the side inserting members 3 is triangular. The base 1 has multiple groups of aluminum profiles connected to form a square frame shape, so that the film can smoothly pass through the base 1 and enter the guide space 201. The transverse cross-section of the edge piece 3 is designed to be triangular, which increases the contact area between the edge piece 3 and the cylindrical film. As the cylindrical film moves upward, the width of the guide space 201 and the edge piece 3 gradually shrinks, making the folding process more stable and more uniform, improving the neatness of the folding of the film bag, improving the appearance quality, and reducing the possibility of folding reset; secondly, the increased contact area and triangular design of the edge piece 3 reduce the risk of the folding piece being covered by the film, avoid the entanglement and jamming of the edge piece 3 and the film during the production process, and improve the operating stability and efficiency of the entire film blowing machine; thirdly, the edge piece 3 can be slidably assembled in the transverse direction of the base 1, making operation and adjustment more convenient and flexible, and the two sets of guide pieces 2 set at an angle to each other form an effective guide space 201, which makes the film smoother and easier to control during the folding process.

[0040] In terms of the specific structure of the guide space 201 formed by the two groups of guide members 2 being arranged at an angle to each other, the present embodiment also includes a double-headed screw 202, the top of the guide member 2 is hinged to the base 1, one end of the double-headed screw 202 is threadedly connected to one group of guide members 2, and the other end of the double-headed screw 202 is threadedly connected to the other group of guide members 2. By rotating the double-headed screw 202, the two groups of guide members 2 can be moved closer to or further away from each other, thereby adjusting the size of the guide space 201, thereby adapting to the production of film bags of different specifications, reducing the difficulty of adjustment operation, and improving production efficiency.

[0041] In order to improve the synchronization of the adjustment of the two sets of guide members 2 and the uniformity of the force, two sets of double-headed screws 202 are provided, and the two sets of double-headed screws 202 are respectively located at the two ends of the lateral direction of the guide member 2. Since the two sets of double-headed screws 202 act at the same time, the size of the guide space 201 can be more accurately controlled. This high-precision adjustment can meet the production requirements of film bags of different specifications and ensure product quality and consistency.

[0042] Furthermore, in order to improve the degree of automation and accuracy of adjustment of the guide space 201, the present embodiment also includes a first motor, a fixed end of the first motor is connected to the base 1, and a rotating end of the first motor is connected to the double-headed screw 202 and is used to rotate the double-headed screw 202. By controlling the rotation angle of the first motor, the opening and closing angles of the two sets of guide members 2 are controlled. By controlling the rotation of the double-headed screw 202 by the first motor, the automation of the adjustment of the guide space 201 is realized, which not only reduces the complexity of manual operation, but also improves the efficiency and accuracy of the adjustment.

[0043] In terms of the specific structure of the side insert 3 that can be slidably assembled in the lateral direction of the base 1, it also includes a support arm 301. An adjustment rod 302 is connected to the side of the side insert 3 away from the guide space 201. The support arm 301 is connected to the base 1 and is used for sliding assembly with the adjustment rod 302. The lateral movement of the side insert 3 is achieved through the sliding assembly of the adjustment rod 302 and the support arm 301, so as to adapt to the processing requirements of film bags with different side insert depths. When the sliding position of the adjustment rod 302 is determined, the position of the adjustment rod 302 is tightened and fixed by using a top screw and the support arm 301 after threaded assembly. Since the film bag is light and thin, the force transmitted to the adjustment rod 302 during processing is small. Therefore, the screw locking method can achieve a reliable and stable fixation of the position of the adjustment rod 302. The precise side insert depth and stable fixing method are helpful to improve the folding quality of the film bag, thereby improving the overall product quality.

[0044] In order to improve the freedom of adjustment of the edge insert 3 and enable the edge insert 3 to be tilted and adjusted to improve the edge inserting effect on the film bag, two groups of adjustment rods 302 are provided. The two groups of adjustment rods 302 are arranged up and down and are respectively connected to the edge insert 3. By adjusting the extension amount of the upper and lower groups of adjustment rods 302, the edge insert 3 is adjusted to be in a vertical or tilted state, so as to adapt to the edge inserting processing requirements of different film bags. By adjusting the inclination angle of the edge insert 3, the edge inserting processing requirements of different film bags can be better adapted, the adjustment freedom can be increased, the edge inserting effect can be improved, and the flatness and quality of the folded edge can be ensured.

[0045] In order to improve the integrity of the edge insertion mechanism 904 and reduce the risk of interference, a connecting hole 3011 is opened in the longitudinal direction of the support arm 301, and the double-headed screw 202 is inserted into the connecting hole 3011 and connected to the guide member 2. The axis of the adjusting rod 302 is perpendicular to the axis of the guide member 2. The double-headed screw 202 is inserted into the connecting hole 3011, so that the inner wall of the connecting hole 3011 supports the double-headed screw 202, so that the entire mechanism can maintain a more stable state when subjected to force, and the risk of bending of the double-headed screw 202 due to force on both ends of the double-headed screw 202 is prevented. Since the axis of the adjusting rod 302 is perpendicular to the axis of the guide member 2, this layout avoids interference between the adjusting rod 302 and the guide member 2 during the adjustment process. At the same time, the double-headed screw 202 is connected to the guide member 2 through the connecting hole 3011, further reducing the possibility of interference with other components and ensuring the smooth progress of the film edge insertion process.

[0046] Reference Figure 5In order to improve the adjustment accuracy of the side insert 3, the outer ring wall of the adjustment rod 302 is provided with a thread, and the adjustment rod 302 is threadedly connected to the support arm 301. By rotating the adjustment rod 302, the extension amount of the adjustment rod 302 is controlled, thereby achieving the adjustment of the side insert 3. Specifically, the side insert 3 is provided with a hollow connecting cavity 303, and the connecting cavity 303 is provided with an opening. The cross-sectional size of the opening is smaller than the cross-sectional size of the connecting cavity 303. The end of the adjustment rod 302 facing the side insert 3 is provided with a pushing portion 3021 extending along its radial direction. The pushing portion 3021 is provided with two groups. The two groups of pushing portions 3021 are arranged at intervals along the axial direction of the adjustment rod 302. One end of the adjustment rod 302 is penetrated through the opening and is located in the connecting cavity 303. One group of pushing portions 3021 is located in the connecting cavity 303, and the other group of pushing portions 3021 is located in the connecting cavity 303. In addition, when the adjusting rod 302 rotates, the extension amount of the adjusting rod 302 changes through the threaded connection with the support arm 301, and the force is transmitted through the pushing portion 3021, thereby pushing the edge insert 3 to move laterally. The adjusting rod 302 is threadedly connected to the support arm 301, so that the extension amount of the adjusting rod 302 can be accurately controlled by rotation, thereby achieving accurate adjustment of the edge insert 3. The threaded connection has a self-locking function, which can effectively prevent the adjusting rod 302 from being displaced when subjected to force, thereby ensuring the stability of the position of the edge insert 3 and further improving the adjustment accuracy.

[0047] Furthermore, in order to improve the degree of automation and accuracy of adjustment of the guide space 201, the present embodiment also includes a second motor, the fixed end of the second motor is connected to the support arm 301, and the rotating end of the second motor is connected to the end of the adjustment rod 302 away from the pushing part 3021 and is used to rotate the adjustment rod 302.

[0048] The present embodiment further includes a plurality of groups of guide blocks 204, which are arranged on the side of the guide member 2 facing the guide space 201. A plurality of guide blocks 204 are provided, and the plurality of guide blocks 204 are arranged at equal intervals along the side wall of the guide member 2. The plurality of guide blocks 204 are arranged at equal intervals along the side wall of the guide member 2, thereby providing a more precise and stable guide for the upward movement of the film, and helping to ensure the accuracy of the position and direction of the film bag during the processing. Secondly, the design of the guide blocks 204 can guide the film bag to smoothly enter the guide space 201, reduce the friction and resistance of the film bag during the movement, improve its fluidity, and thus improve the processing efficiency. Furthermore, the guide blocks 204 can effectively prevent the film bag from being offset or twisted during the processing, and ensure that the film bag can be accurately inserted into the specified position, thereby improving the quality and consistency of the product.

[0049] In order to reduce the generation of static electricity, the guide block 204 is in the shape of a rectangular parallelepiped and is made of wood material. The outer surface of the guide block 204 is sanded to remove knife marks, burrs and uneven parts to make its surface smooth to reduce the risk of scratching the film. Wood material has low conductivity, so the guide block 204 made of wood material can effectively reduce the generation of static electricity and avoid the adverse effects of static electricity on the film bag, such as adsorption.

[0050] In order to increase the friction force of the edge piece 3 when inserting the film and improve the stability of the insertion, the edge piece 3 is provided with a limited slip layer 305, and the limited slip layer 305 is arranged on the outer surface of the edge piece 3, and flannel is wrapped on the edge piece 3 to form the limited slip layer 305. It is worth mentioning that flannel is a kind of cloth with fluff on its surface. It is made of various fiber materials, including cotton, polyester, nylon and acrylic. The flannel surface has fluff, which can provide a larger friction area when in contact with the film, thereby significantly increasing the friction force between the edge piece 3 and the film, ensuring that the insertion process is more stable and reliable. The flannel material is soft and not easy to produce sharp edges, which can effectively avoid scratching or damaging the film during the insertion process and protect the integrity and aesthetics of the film.

[0051] Specifically, the transverse cross-section of the insert 3 is an isosceles triangle, and the inner vertex angle is 10-15°, preferably 13°, so that after the insert 3 is inserted into the film bag, it can form a stable support structure to prevent the film bag from sliding or shifting during processing.

[0052] refer to Figure 4 In order to improve the support for the guide member 2 and reduce the force on the double-headed screw 202, the present embodiment also includes an arc frame 101. The center of the arc frame 101 coincides with the hinge point of the guide member 2 and the base 1. The arc frame 101 is connected to the base 1 and is arranged below the guide frame. The arc frame 101 and the downward end of the guide frame can be slidably assembled. The arc frame 101 is provided with four groups, and the four groups of arc frames 101 are respectively arranged at the end corners of the two groups of guide members 2. When the double-headed screw 202 rotates, the guide member 2 slides along the arc frame 101. The arc frame 101 supports the guide member 2 and enables the guide member 2 to move along the trajectory of the arc portion, thereby enhancing the stability of the guide member 2, ensuring that the guide member 2 moves along the predetermined arc trajectory, improving the insertion accuracy, and ensuring the stability and reliability of the processing process.

[0053] Furthermore, in order to improve the sliding smoothness of the guide member 2 and the arc frame 101, the present embodiment also includes a roller, which is rotatably assembled with the downward end of the guide member 2. The arc frame 101 is provided with an arc groove on the side facing the guide member 2, and the roller slides in the arc groove, thereby improving the sliding smoothness of the guide member 2. The arc groove also reduces the risk of deviation of the guide member 2 when sliding.

[0054] Example 2: Figures 6 to 11 As shown, a film traction mechanism includes a traction bracket 4, a longitudinal drive roller 5, and a reversing member 6. The longitudinal drive roller 5 is rotatably assembled with the traction bracket 4. Two groups of longitudinal drive rollers 5 are arranged at intervals along the longitudinal direction of the traction bracket 4 to form a vertical traction space 501. The reversing member 6 is assembled with the traction bracket 4 and is located above the longitudinal drive roller 5. The reversing member 6 is used to change the flow direction of the film after passing through the vertical traction space 501 from bottom to top to a downward inclined flow direction. It should be noted that in order to improve the smoothness of the film passing through the vertical traction space 501, the axes of the two sets of drive rollers are on the same horizontal line, which simplifies the traction path of the film bag. By adjusting the position relationship between the reversing member 6 and the traction space, the traction effect of the traction mechanism 902 on the film bag can be flexibly adjusted to ensure that the film bag is evenly stressed during the traction process, improve the traction stability, simplify the traction path of the film bag, reduce the complexity of operation, reduce the probability of film bag tearing and damage, and improve product quality and reliability of the production process; secondly, the reversing member 6 effectively adjusts the reversing angle of the rising film bag, enhances the flexibility of the traction mechanism 902, and adapts to the production needs of film bags of different specifications and speeds.

[0055] In order to facilitate the film to pass through the vertical traction space 501, it is necessary to set up a vertical traction space 501 with adjustable width. The present embodiment also includes a first cylinder 502 and a longitudinal sliding block 503. The longitudinal drive roller 5 at the right end corresponding to the traction bracket 4 is provided with a longitudinal sliding groove 401. The longitudinal drive roller 5 is rotatably assembled with the longitudinal sliding block 503. The longitudinal sliding block 503 slides on the inner wall of the longitudinal sliding groove 401. The fixed end of the first cylinder 502 is connected to the traction bracket 4. The pushing end of the first cylinder 502 is connected to the longitudinal sliding block 503 and is used to push the longitudinal drive roller 5 at the right end to move back and forth toward the longitudinal drive roller 5 at the left end, thereby adjusting the width of the vertical traction space 501. The width of the vertical traction space 501 can be flexibly adjusted to adapt to films of different widths, thereby improving the versatility and applicability of the equipment, ensuring that the film remains stable during the traction process, and thus improving the traction quality.

[0056] In order to improve the film that flows into the vertical traction space 501 and can be smoothly reversed to a downward tilted state, in terms of the specific structure of the reversing member 6, the reversing member 6 is arranged in an arc shape, and the center of the reversing member 6 is arranged close to one side of the driving roller. The arc-shaped reversing member 6 is a minor arc. The film that passes through the vertical traction space 501 from bottom to top flows to the arc-shaped reversing member 6, and changes its flow direction along the inner wall of the arc-shaped reversing member 6. The arc-shaped reversing member 6 is designed so that the film can smoothly change its flow direction along its inner wall, and smoothly transition from the vertical traction space 501 to a downward tilted state, effectively reducing the resistance and possible creases of the film during the reversing process, and ensuring the smoothness and stability of the reversing; secondly, the inner wall of the arc-shaped reversing member 6 provides a smooth transition surface to prevent the film from being damaged due to right-angle or acute-angle contact during reversing, thereby ensuring the integrity and quality of the film.

[0057] Preferably, the arc center angle of the reversing member 6 is 100°, which ensures a sufficient reversing angle and avoids excessive stretching or deformation of the film during reversing due to a too small angle, thereby ensuring the stability and safety of the reversing process.

[0058] In order to make the switching of the film by the switching member 6 smooth and accurate, improve the degree of freedom of the switching member 6, and adapt to the switching requirements of different film production, it also includes a swing arm 601, one end of the swing arm 601 is assembled with the switching member 6, the other end of the swing arm 601 is rotatably assembled with the traction bracket 4 and is used to move the switching member 6 back and forth toward the vertical traction space 501, and the traction bracket 4 is provided with a right-angle frame 6011 for assembling the swing arm 601, the right-angle frame 6011 is provided with a first connecting hole, and one end of the swing arm 601 assembled with the traction bracket 4 is provided with a second connecting hole, which is screwed through the first connecting hole After being connected with the second connecting hole, the nut and the screw are threadedly connected to realize the rotation of the swing arm 601 and the traction bracket 4. When rotated to the preset angle, the locking nut is used to fix the angle of the swing arm 601 and the traction bracket 4. Since the film bag is light and thin, the force transmitted to the swing arm 601 during processing is small. Therefore, the nut locking method can achieve a reliable and stable fixation of the position of the swing arm 601. The swing arm 601 enables the switching element 6 to be fine-tuned according to the switching requirements of the film, ensuring that the film can smoothly and accurately change the flow direction during the switching process, reducing wrinkles and damage to the film.

[0059] In order to further improve the adjustment freedom of the switching member 6, it also includes a connecting arm 602, and a long hole 6012 is provided at one end of the swing arm 601 close to the guide member 2, and the long hole 6012 is extended along its longitudinal direction. One end of the connecting arm 602 is connected to the outer side of the switching member 6, and one end of the connecting arm 602 is screwed to the long hole 6012. The connecting arm 602 has a third connecting hole. After the screw is passed through the third connecting hole and the long hole 6012, the nut is threadedly connected to the screw, so that the connecting arm 602 can move along the inner wall of the long hole 6012 and rotate around the axis of the third connecting hole, thereby improving the adjustment freedom of the switching member 6. When it moves and / or rotates to the preset position, the locking nut is used to fix the position of the connecting arm 602 and the swing arm 601. Since the film bag is thin and light, the force transmitted to the swing arm 601 during processing is small. Therefore, the use of screw locking can achieve a reliable and stable fixation of the position of the swing arm 601. It should be noted that since the commutator 6 is arranged in an arc shape, the inner side of the commutator 6 points to the direction of the center of the circle, while the outer side of the commutator 6 points away from the center of the circle. Through the combination of the connecting arm 602 and the long hole 6012, the commutator 6 can not only realize the overall angle adjustment under the drive of the swing arm 601, but also can move longitudinally along the inner wall of the long hole 6012, thereby improving the freedom of adjustment of the commutator 6, so that the commutator 6 can more accurately adapt to the commutation requirements of different films.

[0060] In order to facilitate the control of the angle adjustment accuracy of the guide member 2, the axis of the connecting arm 602 coincides with the angular bisector of the commutator 6, and the angle between the axis of the swing arm 601 and the line connecting the centers of the two sets of longitudinal drive rollers 5 is 65°~85°, preferably 77°. By making the axis of the connecting arm 602 coincide with the angular bisector of the commutator 6, it can be ensured that the commutator 6 can swing evenly and symmetrically during adjustment, thereby accurately controlling the angle of the commutator 6, improving the commutation accuracy, and reducing film damage or wrinkles caused by the angle deviation of the commutator 6. Secondly, by selecting a suitable angle, the resistance and friction encountered by the film during the commutation process can be minimized, thereby improving the commutation efficiency.

[0061] After the film passes through the reversing member 6, the flow direction is changed to a downward inclined setting. In order to pull the film flowing downward, this example also includes two groups of vertical transmission rollers 7. The vertical transmission rollers 7 are rotatably assembled with the traction bracket 4. The two groups of vertical transmission rollers 7 are arranged along the vertical intervals of the traction bracket 4 to form a longitudinal traction space 701. The inner wall of the longitudinal traction space 701 is used to pull the film flowing through the reversing member 6. After the film passes through the vertical traction space 501 from bottom to top, it abuts against the reversing member 6 to reverse the flow direction and enters the longitudinal traction space 701. Then the film is further guided downward, thereby completing the film winding work. The two groups of vertical transmission rollers 7 can ensure that the film is stably pulled in the downward inclined flow direction, maintain the flatness of the film, improve product quality, and make the film winding process smoother.

[0062] In order to facilitate the film to pass through the longitudinal traction space 701, it is necessary to set up a longitudinal traction space 701 with adjustable width. The present embodiment also includes a second cylinder 702 and a vertical sliding block 703. The traction bracket 4 is provided with a vertical sliding groove 402 corresponding to the vertical transmission roller 7 at the upper end. The vertical transmission roller 7 is rotatably assembled with the vertical sliding block 703. The vertical sliding block slides on the inner wall of the vertical sliding groove. The fixed end of the second cylinder 702 is connected to the traction bracket 4. The pushing end of the second cylinder 702 is connected to the vertical sliding block and is used to push the vertical transmission roller 7 at the upper end to move back and forth toward the vertical transmission roller 7 at the lower end, thereby adjusting the width of the longitudinal traction space 701.

[0063] It is worth mentioning that the longitudinal transmission roller 5 is used to squeeze out the air in the film bag, and the surface of the vertical transmission roller 7 is provided with a raised pattern for embossing the pattern on the film bag.

[0064] In terms of the specific arrangement position of the vertical transmission roller 7, the present embodiment further includes a first guide plate 403. Both groups of vertical transmission rollers 7 are located below the longitudinal transmission roller 5. The first guide plate 403 is arranged between the longitudinal transmission roller 5 and the vertical transmission roller 7, and the first guide plate 403 is gradually inclined downward from the longitudinal transmission roller 5 to the vertical transmission roller 7. The eccentricity between the vertical transmission roller 7 at the upper end and the longitudinal transmission roller 5 is L, and the diameter of the vertical transmission roller 7 is D, L=0.08~0.1D. The eccentricity L is the distance between the center of the vertical transmission roller 7 at the upper end and the center of the longitudinal transmission roller 5 in the vertical direction. The first guide plate 403 provides a smooth transition surface for the film, so that the film can smoothly transition from the longitudinal transmission roller 5 to the vertical transmission roller 7.

[0065] Specifically, the first guide plate 403 is located between the longitudinal drive roller 5 arranged at the left end and the vertical drive roller 7 facing the lower end. The angle between the first guide plate 403 and the line connecting the centers of the two groups of longitudinal drive rollers 5 is 20~25°. Preferably, the first guide plate 403 is externally cut with the top wall of the vertical drive roller 7 facing the lower end to optimize the traction path of the film bag so that the film can transition from the longitudinal drive roller 5 to the vertical drive roller 7 in the smoothest path.

[0066] In order to further pull the film passing through the longitudinal traction space 701 downward for easy winding, the present embodiment further includes a traction wheel 801, which is rotatably assembled with the traction bracket 4, and the traction wheel 801 is located below the vertical transmission roller 7 and on the side away from the longitudinal transmission roller 5, and the vertical transmission roller 7 and the longitudinal transmission roller 5 are arranged at intervals in the longitudinal direction, and the traction wheel 801 and the vertical transmission roller 7 are arranged at intervals in the longitudinal direction. The film flowing out of the longitudinal traction space 701 moves downward after passing through the outer annular wall of the traction wheel 801. Through the auxiliary effect of the traction wheel 801, the film can complete the transition from the longitudinal traction space 701 to the winding position more quickly, thereby improving the efficiency of the entire winding process.

[0067] Among them, this embodiment also includes a second guide plate 404, which is arranged between the vertical transmission roller 7 and the traction wheel 801, and the second guide plate is gradually inclined downward from the vertical transmission roller 7 to the traction wheel 801. The top wall of the vertical transmission roller 7 at one end of the second guide plate 404 is externally cut, and the top wall of the traction wheel 801 at the other end of the second guide plate 404 is externally cut. The second guide plate provides a smooth transition surface during the transfer of the film bag from the vertical transmission roller 7 to the traction wheel 801, thereby reducing the stagnation and deviation of the film that may occur during the transfer process.

[0068] In terms of the specific structure of the rotation and traction of the longitudinal drive roller 5 and the vertical drive roller 7, the present embodiment also includes a traction motor 8, which is assembled with the traction bracket 4 and is used to synchronously drive the longitudinal drive roller 5 on the left side and the vertical drive roller 7 toward the lower end. The traction motor 8 can synchronously drive the longitudinal drive roller 5 and the vertical drive roller 7 to ensure the consistency of the rotation speed and rotation direction of the two, avoid problems such as film stretching, twisting or offset caused by asynchronous rotation speed, and improve the accuracy and stability of film traction.

[0069] Furthermore, the present embodiment also includes a first driven wheel, a second driven wheel, a driving wheel, and a belt. The fixed end of the traction motor 8 is connected to the traction bracket 4 and is located below the first guide plate 403. The rotating end of the traction motor 8 is axially connected to the driving wheel. The first driven wheel is axially connected to the longitudinal transmission roller 5 on the left side. The second driven wheel is axially connected to the vertical transmission roller 7 at the lower end. The belt is sleeved between the first driven wheel, the second driven wheel, and the driving wheel.

[0070] Example 3: Figures 1 to 12 As shown, a film blowing machine includes a machine base 9, an extrusion mechanism 901, a winding mechanism 903, and also includes an inserting mechanism 904 for film production in Example 1 and a film traction mechanism 902 in Example 2. The extrusion mechanism 901 is mounted below the machine base 9 and is used to process plastic raw materials into films. The inserting mechanism 904 is mounted above the machine base 9 and is used to fold the film into a film bag. The traction mechanism 902 is mounted on the base 1 and is used to traction the film bag moving upward to move downward. The winding mechanism 903 is mounted on one side of the machine base 9 and is used to wind up the film bag, so as to realize the integrated and efficient operation of film bag production and improve production efficiency. The film is accurately folded into a film bag by the inserting mechanism 904, so that the flatness and aesthetics of the bag mouth are guaranteed and the product quality is improved. The traction mechanism 902 can accurately control the moving speed and direction of the film bag to ensure its stability and continuity in the whole production process, reduce manual intervention and improve the automation degree of the production process.

[0071] In terms of the direction of the film bag moving from the traction mechanism 902 to the winding mechanism 903 for winding, the present embodiment further includes a first guide wheel 905, a second guide wheel 907, and a third guide wheel 909. The first guide wheel 905 is connected to the machine base 9 through a first bracket, and the first guide wheel 905 and the first bracket are rotatably assembled. The first guide wheel 905 is located below the base 1, and the tangent line of the first guide wheel 905 coincides with the tangent line of the traction wheel 801. The second guide wheel 907 is assembled on the side wall of the machine base 9 through a second bracket, and the second guide wheel 907 and the second bracket are rotatably assembled. The third guide wheel 909 is assembled through the third bracket. Assembled on the side wall of the machine base 9 and located below the second guide wheel 907, the third guide wheel 909 and the third bracket are rotatably assembled. The film bag passes through the side of the traction wheel 801 away from the traction bracket 4, then passes through the side of the first guide wheel 905 away from the machine base 9, then passes through the side of the second guide wheel 907 away from the machine base 9, then passes through the side of the third guide wheel 909 close to the machine base 9, and then passes through the winding mechanism 903 for winding. Through the precise arrangement of the three guide wheels, the direction of the film bag is optimized, so that the film bag can enter the winding mechanism 903 more smoothly and efficiently, thereby improving the speed and efficiency of the entire production line.

[0072] In terms of the specific assembly of the edge insertion mechanism 904 and the traction mechanism 902, the traction bracket 4 is assembled on the base 1, and the traction space is located directly above the guide space 201. Since the traction space is located directly above the guide space 201, after the edge insertion mechanism 904 completes folding to form a film bag, the film can directly enter the traction space upward without additional turning or adjustment, thereby simplifying the production process and improving production efficiency.

[0073] It is worth mentioning that, since the traction mechanism 902 is provided with a reversing member 6, when the film blowing machine starts to process and pull out the film, the operator is located below the edge insertion mechanism 904, and passes the cylindrical film blown out by the extrusion mechanism 901 upward, passing through the guide space 201 and the vertical traction space 501 in sequence, and then the film abuts against the reversing member 6, changes the moving direction, moves along the first guide plate 403 to the longitudinal traction space 201, and then moves along the second guide plate 403 to the traction wheel 801. The film blowing machine in the prior art is not provided with a reversing member 6, and the operator needs to climb up the traction bracket 4 through the escalator, and multiple operators need to cooperate to manually pass the film on the traction wheel 801. Compared with the film blowing machine in the prior art, this embodiment reduces the difficulty of film penetration, improves the convenience of film penetration, improves the safety of film penetration operation, reduces the workload of operators, and improves the efficiency of film penetration before film blowing machine production.

[0074] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An edge inserting mechanism for film production, characterized in that: It includes a base, two groups of guide members and two groups of insert members. The guide members can be rotatably assembled in the longitudinal direction of the base. The two groups of guide members are arranged at an angle to each other to form a guide space. The insert members can be slidably assembled in the transverse direction of the base. The two groups of insert members are arranged to each other and slide back and forth toward the guide space. The transverse cross-section of the insert members is a triangle.

2. The edge inserting mechanism for film production according to claim 1, characterized in that: It also includes a double-headed screw, the top of the guide member is hinged to the base, one end of the double-headed screw is threadedly connected to one group of the guide members, and the other end of the double-headed screw is threadedly connected to another group of the guide members.

3. The edge inserting mechanism for film production according to claim 2, characterized in that: It also includes a support arm. The side of the edge insert away from the guide space is connected with an adjustment rod. The support arm is connected to the base and is used for sliding assembly with the adjustment rod.

4. The edge inserting mechanism for film production according to claim 3, characterized in that: The adjusting rods are provided in two groups, and the two groups of adjusting rods are arranged up and down and are respectively connected with the edge inserts.

5. The edge inserting mechanism for film production according to claim 4, characterized in that: A connecting hole is provided in the longitudinal direction of the support arm, the double-headed screw is passed through the connecting hole and connected with the guide member, and the axis of the adjusting rod is perpendicularly arranged to the axis of the guide member.

6. The edge inserting mechanism for film production according to claim 4, characterized in that: The outer ring wall of the adjusting rod is provided with threads, and the adjusting rod is threadedly connected with the supporting arm.

7. The edge inserting mechanism for film production according to claim 1, characterized in that: It also includes several groups of guide blocks, which are arranged on the side of the guide member facing the guide space. There are multiple groups of guide blocks, and the multiple groups of guide blocks are arranged at intervals along the side wall of the guide member.

8. The edge inserting mechanism for film production according to claim 1, characterized in that: The edge insert is provided with a limited slip layer, and the limited slip layer is provided on the outer surface of the edge insert.

9. The edge inserting mechanism for film production according to claim 1, characterized in that: The transverse cross section of the edge insert is an isosceles triangle, and the inner vertex angle is 10-15 degrees.

10. A film blowing machine, characterized in that: It includes a machine base, an extrusion mechanism, a traction mechanism, a winding mechanism, and also includes an inserting mechanism for film production as described in any one of claims 1 to 9, wherein the extrusion mechanism is mounted below the machine base and is used to process the plastic raw material into a film, the inserting mechanism is mounted above the machine base and is used to fold the film into a film bag, the traction mechanism is mounted on the base and is used to pull the film bag moving upward to move downward, and the winding mechanism is mounted on one side of the machine base and is used to wind up the film bag.

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